Envelop-ctjtting machine



E. E. ANDERSON.

ENVELOP CUTTING MACHINE.

APPLICATION FILED IAN. 3. mm.

1,313,244. Patented Aug. 19, 1919.

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H 10' I .0\\ ,7 1 4 2 19: I 47/ I; 4 1/ E7629? EAflJQQTO'OQINVENTOR WITNESSES W BY WW,

, ATTORNEY THE COLUMBIA PLANOGRAPH 60., wAsIiINdToN, D. C.

im'irnn STATES PAT N O I ELDER E. ANDERSON, 0F MINNEAPOLIS, MINNESOTA.

ENVELOP-OUTTING MACHINE. 4

To all whom it may concern Be it known that I, ELDER E. ANDERSON, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Envelop- Cutting Machines, of which the following is a specification.

This invention relates to cutting implements, and particularly to devices for cutting paper.

The invention aims primarily to provide an improved envelop cutter, by the use of which envelops may be cut evenly and smoothly at one side or end sothat the envelop may be preserved, and wherein the cutting action cannot impair the contents of the envelop. sides in the provision of a cutting implement which includes an improved guide, whereby cutting of the envelop inwardly from its edge beyond a predetermined distance will be prevented. Still further objects reside in providing a cutting mechanism of the character set forth which is of extremely simple and inexpensive construction, which is formed of but few readily assembled parts, all of which are so assembled as to minimize the opportunity for wear, breakage, or derangement, which is positive in operation, and which will prove thoroughly efficient in the attainment of the ends set forth.

lVith these objects in view, together with others which will appear as the description proceeds, the invention resides in the novel formation, combination, and arrangement of parts, all as will be described more fully hereinafter, illustrated in the drawings, and particularly pointed out in the claims.

In the drawings Figure 1 is a front elevation partly in section, of an envelop cutting machine constructed in accordance with the invention;

Fig. 2 is a sectional view taken upon line 2-2 of Fig. 1; and

Fig. 3 is a horizontal section taken on line 3-3 of Fig. 1.

Referring now more particularly to the drawings, 4 indicates a base, preferably small and rectangular in shape, and which may be formed of wood The block forming the base 4 is cut away on its upper surface to provide a groove or recess 5, the said recess being arranged at one end of Specification of Letters Patent.

A still further object reedge of the blade.

Patented Aug. 19, 1919.?

Application filed January 3, 1917. Serial No. 140,403.

the block 5 and being {disposed laterally thereof. I A cutting blade 6, preferably of metal, rests withinthe groove [of the recess 5, and may be secured to'the block by screws 7. This metallic member consti tutes a shearing edge for the knife' to be hereinafter detailed, and is of a size equal to the space formed bythe notch 5."

' Secured to the forward end of the base 4 .in any preferred manner is a yoke or arch member 8, the' legs of which are seowed to theopposite sides ofthe base 4. The inner faces of these legs arerprovided with longitudinally. disposed grooves 9, within which the opposing ends of a knife blade 10 ride. The central portion oI-the top or' bight member connecting the legs 8 'of the yoke providesa vertically disposed barrel 11 through which slides a shank or plunger 12, the lower end of the said shank being connected as by screws 13 to the blade 10. The upper end of the plunger 12 is provided with a head or knob 14, and an expansion spring 15 encircles the plunger, and bears at its ends against the head 14 and the barrel 11. This spring normally maintains the plunger in raised position, so

that the cutting edge of the knife 10 is removed from the shearing blade 6 on the base.

It will; be observed that the knife 10 is provided at its lower end with a cutting edge 1 16, the latter being beveled rearwardly as shown, and the said cutting edge is inclined slightly from one end to the other of the blade. This inclination produces the desired shearing action as the blade is lowered. It will be observed particularly with reference to Fig. 2, that the forward edge of the blade 6 terminates in the same plane with the rearmost Walls of the grooves 9, and therefore, the blade in its downward movement will pass 1n close proximity to the forward Stops 17 extend into the grooves 9 upon each of the yoke legs, and these stops limit the downward movement of the shearing blade.

It will be realized that inasmuch as the stops are screwthreaded and movable into and out of'the grooves, blade 10 is inserted before they are projected into the grooves, or they may be Withdrawn to permit insertion. After insertion of the blade, the stops are projected into the grooves so that the blade may rest thereon and be supported thereby while the stem or plunger 12 is secured thereto through the medium of screw 13.

Arranged upon the forward edge of the base 4 is a gage 18. This gage includes an upwardly extending arm 19,.Which is "disposed slightly beyond the path of travel of the blade 10, and the said arm limits the movement of envelops projected beneath the arch from the rear of the base. By providing a gage of this character, all envelops operated upon by the knife will have their edges cut an equal distance inwardly from the edge, whereby uniform cutting action of the instrument is maintained. It will be understood that envelops to be out are deposited one at a time upon the base 4:, and moved forwardly upon the base and beneath the yoke 8. The arm of the gage will limit the movement of the envelops, and downward movement applied to the plunger 12 will cause the edge of the envelop to be clearly cut. Immediately upon releasing the plunger, the latter moves upwardly under impulse of the spring 15.

lVhile the present is a disclosure of what I believe to be the preferred embodiment of the invention, it is to beunderstood that theinvention is not limited thereto, but that' various changes may be made in the construction, arrangement, and proportion of parts, without departing from the spirit of the invention, as defined in the appended claim.

What is claimed is In a device of the class described, a onepiece frame having side bars, eaeh side bar having a groove, a cutter slidable in said grooves, a base for the frame having means with which the cutter cooperates for shearing, detachable operating means for the cutter, andstop means movable into and out of the grooves to permit insertion of the (rutter therein and to secure the cutter against accidental displacement from the grooves, and said stop means serving to support the cutter during attachment of the operating means thereto and to limit the downward movement of the cutter during operation.

In testimony whereof I affix my signature in presence of two witnesses.

ELDER E. ANDERSQN.

Vitnesses LAWRENCE T. ANDERsoN, FLOYD R. PEPPERLING.

Copies 0! this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

